We are trying to do a video conference between a location in Europ and one in US. When we transfer data between both locations we can do about 6 megs but when we use Nefsis for a 1 on 1 video conference the speed is like dial up.

Is their any way to test and find out where the issue is. My understanding is that the video is not p2p and it travels through nefsis central server ?

You can use the built-in network diagnostics in the conferencing client to test your connecting to the conferencing server and help determine where any potential slowdowns are occurring. See this page from our online user guide for more information: http://www.nefsis.com/manual/cc-net-diagnostics.html